Interval Timer +‪+‬ 4+

HIIT & circuit workout timer

Sunny Studio

Designed for iPad

    • 4.8 • 13.9K Ratings
    • Free
    • Offers In-App Purchases


Award-winning app for your daily workouts! Simple set up, intense workout:
*** One touch to set up Workout, Rest, and Repeat.
*** Supports both iPhone and Apple Watch
*** Colorful design, to give you some eye candy while working hard
*** Multiple timers for easy access and training
*** Premium timers where different fitness types are mixed
*** Background notification, so you can keep working out while browsing other apps, or even when screen is locked
*** Listen to your favorite music while working out
*** See your workout history in calendar view

Health App Integration
We integrate with the health app (HealthKit) to read and track your steps data and show them in a beautiful way.

Feature details:
- Workout duration: 2 seconds to 8 minutes
- Rest duration: 0 seconds to 8 minutes
- Repeat: 20 times (50 times if purchased Premium Subscription)
- Premium timers: mix fitness types, including Planks, Jumping Jack, Push Ups, Sit Ups, High Knees, Side Planks, Butt Kicks, Side Lunges, Lunges, etc.
- Multiple timers for quick access
- Name your timers
- Swipe-to-delete timers
- Drag-n-drop to reorder custom timers
- 10 seconds count down, so you can get into workout position
- Count down sound before next workout starts, for you to recover position
- Pause and resume workout at any time
- Reset at any time if workout was interrupted
- Calendar view: shows your work/rest/repeat sessions
- Listen to your favorite music in background, while working out the Interval Timer in foreground
- Background music will be tuned down when playing workout sounds
- Vibration / Haptic feedbacks between workout and rest
- Ability to mute all workout sound

Users say good works after usage:
"I love the simplicity and ease of use of this app. It is almost exactly what I am looking for."
"No frills or gimmicks, this app gives it to you straight, which is how interval timers should work IMO."
"An eye-candy for your tough workouts."
"Mind-blowing on how easy it is to use."
"Simple. Does EXACTLY what you need."

Also checkout our awesome demo video on Youtube:

Interval Timer Pro (In App Purchase):
- Create unlimited number of timers for easy access
- Use our premium timers
- Repeat workout for more than 20 times

• You can subscribe for Interval Timer Pro inside the app; subscriptions are billed monthly or annually at the rate selected depending on the subscription plan.
• Alternatively a one-time payment plan is available (this is not a subscription).
• Payment will be charged to your iTunes account at confirmation of purchase.
• Subscriptions will automatically renew unless auto-renew is cancelled at least 24 hours before the end of current period.
• Your account will be charged according to your plan for renewal within 24 hours prior to the end of the current period.
• You can manage or turn off auto-renew in your Apple ID account settings at any time after purchase.
• To manage your subscriptions or turn off auto-renewal:
- Go to Settings > iTunes & App Store
- Tap your Apple ID at the top of the screen
- Tap View Apple ID. You might need to sign in or use Touch ID.
- Tap Subscriptions.
- Tap the subscription you want to manage.
- Use the options to manage your subscription.
• No cancellation of the current subscription is allowed during the active subscription period. Once purchased, refunds will not be provided for any unused portion of the term.
We take the security of our customers very seriously.
Read our Terms of Service at
and our Privacy Policy at

Lock by Maxim Kulikov from the Noun Project
Premium by Gregor Cresnar from the Noun Project

What’s New

Version 4.3.3

Simple & Powerful workout timer for HIIT and Tabata.
- Automatically sync the workouts data from Watch app with the Interval Timer app

Ratings and Reviews

4.8 out of 5
13.9K Ratings

13.9K Ratings

Smc1986 ,

Crucial missing feature - now added by dev!

Raising my rating from 3 to 5 stars. The update you just released addresses my concerns completely. Specifically, the new ‘Countdown Beep’ is much more pleasant to hear and fits well with the start and rest sounds. The other sound options are a great plus too. Thank you for taking my review into consideration and coming out with an update so quickly. I’ve purchased the premium and am using it with my home workouts going forward. Thanks again, and good work.

[Old review - no longer relevant...]
I want to rate this higher, because it more or less provides what I’m looking for. However, a fatal flaw is a complete lack of customization for the sounds. The countdown “bell” ... [redacting the rest of this old review since dev released update]

Developer Response ,

Hi! Thanks for feedback. Your review was quite instructive for our development team. We’ve made serval improvements according to your suggestion. Please update your app to its latest version. There would be more sound options for you to choose and replace the current ones. We’d appreciate it if you could send more feedback to us at Hope you enjoy this app!

bluehazetech ,

Exactly what I need with one minor bug

I‘m using the Pro version as part of a free trial because I really wanted to try the custom timers. After setting up a HIIT workout with a bunch of named exercises, I found the flexibility of the timers to be perfect for my workout. Unfortunately, I have a few exercises where I need to switch from left to right halfway through, and the halfway beep sound doesn’t appear to work. Other than this one issue, this app is exactly what I was looking for. The customizable sounds help distinguish between different parts of the workout, even with music playing. The colors are easy on the eyes and the overall design is very clean and intuitive. I’ve tried a bunch of other workout/interval timer apps and this is the best by far.

JoeyMtSac ,

Awesome timer and great tech support

I had been trying different timers and I really liked this one because you can do a 16 minute routine with 4 sub routines within it (basically, it beeps you every 4 minutes). Well, at least that’s my timer routine so I bought the lifetime membership and it was great. But something happened a month or so later and it started showing me the nag screen (the one that offers you different rates). So that got old fast. So I wrote up a support question. *Bert* immediately emailed back (well, at least within 48 hours) and, I’m not gonna lie. It took some time but, after a few weeks, they were able to come out with a (literally) bug-free version. Yay Bert and the awesome developers of this app!! My thanks guys. ~ Joey

Developer Response ,

Thanks a lot, Joey. We feel honored to earn your five-star rating and favorable review. Thank you for offering us your valuable feedback, which encouraged us to make continuous improvements. Hope you keep enjoying Interval timer++ app!

App Privacy

The developer, Sunny Studio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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